Thought this was among the steals of the year in the Jordan 90s area. That card is a 600 USD card ungraded, in BGS 9 around 1000 USD and for a BGS 9.5 3250 USD were paid back in February of this year.
So, you should have paid the seller right away. Whenever a Jordan 90s goes that low, the seller
will be flooded with mails including higher offers then the final sales price, as demand is huge for rare 90s of MJ.
After reading the communication with the seller i have to join the majority of members here and
say, do not pay, because he absolutely seems unwilling to send you a 500 - 600 USD card for 265.
Its not right, but there are very few things you could do.